One Fitness App

• Free to download
• In-app purchases

Last verified 31 Jul 2026

4.8 1860 ratings · App Store

1. 5/5The best workout app!!

   I have followed Iulia’s fitness Instagram page for a few years and have used it for workout inspiration every now and then, but my biggest challenge in consistently working out has always been planning. I never knew what I wanted to do when I went to the gym so I always defaulted to leg day (my favorite day). This app gives me a clear plan with what I need to do each day with recommended sets and reps. It keeps me from neglecting working the parts of my body that I just may not know exactly what workouts to do for. The videos and written descriptions that go with each move make it super easy to see exactly how to do it correctly. It I have been using it for several months now and have seen dramatic changes in my weight and overall strength! I have been using the ‘Lose Body Fat at the Gym’ plan but there are different plans for whether you are wanting to just tone, strengthen, or build muscle. There are also home workouts if you can’t get to a gym. Overall I love love love this app, Iulia is the bomb❤️

   LexiG13 · 31 Jul 2026

2. 3/5Evolution is a Necessity

   I’ve been a loyal member of this app for about 7 years. I used to suggest this app to anyone needing a plan. I like the ease of being able to navigate the workouts and demos she provides. However, I started getting bored with the same workouts ALL of the time. She has a certain set of workouts/exercises in rotation that she mix and matches to create a workout plan. And you’ll find from week to week your doing the same workout from last week or the week prior. Not enough variety! She could have kept me had she added to her content by at least adding a new workout a month or something in programs like Muscle Mission (for example). This would benefit her and members as library would gradually increase for her to choose from when creating weekly plans. So if you’re new, you may like it at first but after about 6 months (if not sooner) you will get tired of the repetitive workouts… which means boring… which means plateau in gains. I promise, do your research it’s better app options out there that’s just as easy to navigate app-wise and a huge variety of workout options. I found one recently and almost felt like I had been getting hustled by this app the past 7 years because their prices are even better than hers. My two cents from a 5-6 day a week gym rat who used her app for years because I was too complacent to research other apps.

   Aloner26 · 31 Jul 2026

3. 5/5By far my favorite workout app

   I started following Iulia on Instagram a few years back. I was in between workout programs and she had advertised her app so I decided to try it out. I haven’t used anything else since. I look forward to my workouts. I love keeping track of what I’m doing and how much weight I’ve lifted. I recently have started using the kitchen / macros part of the app as well and love it. The only thing I can complain about is sometimes I don’t have what I need at my gym to do certain workouts, but the alternatives help and if there is no alternative option I know enough now to know what would work just as well. Like I said I look forward to my workouts and typically look at what my workout will look like the day before and the day of. A lot of workouts will have you do the same stuff over and over but this program is always different so you’re not getting bored of doing the same workouts. Highly recommend!

   bduuub · 31 Jul 2026

4. 4/5Good guidance still looking up videos elsewhere

   I just downloaded this app in hopes of being able to workout on my own in a conventional gym. I come from a Crossfit and Olympic lifting background but have absolutely no clue how to form my own workout. I have been so reliant on trainers in the past. Let me tell you... the first workout I did was a full body workout and I was sore in parts of my muscles I didn’t even know existed. She uploads every week for the full week so you honestly could plan your week around it if needed based on how you need to place your rest day. So far I’m extremely happy with this app. However, her example videos are sometimes in off positions so it’s hard to tell what she is doing. Usually the written descriptions clarify but I find myself still looking up videos online. Granted, I’m not an avid weight machine user. Another thing that would be helpful is a section to help decided weight to use. I generally know what I am capable of but I know a lot of people aren’t. This also comes with experience so it’s not a huge inconvenience. So far pretty happy. We will see where I am at in a few months.

   Kurrlss · 31 Jul 2026

5. 5/5The Start to Something Better

   I was in Cross Country throughout high school and I was always active, but once I got to college, all of that changes. It was hard to stay motivated to be fit and my love for running went away. I could not figure out what to do to be motivated again. One day, I came across Iulia in my Instagram explore feed and have been following her for over a year. I have doing her work outs before she even had an app, and it has made a huge difference in my lifestyle. The app has made using her program so much easier, but I have always been a fan of hers. It’s perfect for people who want to see a change in themselves in a fun way. Instead of only focusing on flattening my stomach, I can also focus on toning up my entire body. That change in attitude has made a HUGE difference in my fitness journey. LOVE LOVE LOVE HER

   DeAnneLex · 31 Jul 2026

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